linux安装多tomcat的配置方法（常见问题：Cannot find //bin/setclasspath.sh）

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1、conf/server.xml中涉及的端口全修改为不冲突的
1)　 <Server port="8005" shutdown="SHUTDOWN">
2) <Connector port="8080"
3) <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
4) redirectPort="28443" />
...
8005、8080、8009、8443每个端口可能存在多个，全为替换下即可。

2、新增如下变量(x为第几个tomcat)

JAVA_HOME_x
JRE_HOME_x
CATALINA_BASE_x
CATALINA_HOME_x
CLASSPATH_x
PATH_x
如：
export JAVA_HOME_8=/usr/java/jdk1.8.0_121
export JRE_HOME_8=/usr/java/jdk1.8.0_121/jre
export CATALINA_BASE_8=/home/xxx/apache-tomcat-8.5.11
export CATALINA_HOME_8=/home/xxx/apache-tomcat-8.5.11
export CLASSPATH_8=.:${CATALINA_HOME_8}/bin/tomcat-juli.jar:${CATALINA_HOME_8}/bin/bootstrap.jar:$JAVA_HOME_8/lib:$JAVA_HOME_8/lib/tools.jar:$JAVA_HOME_8/jre/lib

export PATH_8=$JAVA_HOME_8/bin:$JRE_HOME_8/bin:$PATH

=》此步配置错误的话，经常导致如下错误：

[root@xxxxx bin]# sh startup.sh
/home/xxx/apache-tomcat-8.5.11/bin/catalina.sh: line 120: uname: No such file or directory
/home/xxx/apache-tomcat-8.5.11/bin/catalina.sh: line 141: dirname: No such file or directory
Cannot find //bin/setclasspath.sh
This file is needed to run this program

3、在bin/catalina.sh中第一句有效代码前面插入
...
# signals. Default is "false" unless running on HP-UX in which
# case the default is "true"
# -----------------------------------------------------------------------------
export JAVA_HOME=$JAVA_HOME_8
export JRE_HOME=$JRE_HOME_8
export CATALINA_BASE=$CATALINA_BASE_8
export CATALINA_HOME=$CATALINA_HOME_8
export CLASSPATH=$CLASSPATH_8
export PATH=$PATH_8
...

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